fatal error while installing

[charlotteVDD]

Hello !

while installing, I ran
python setup.py build_ext
I got this answer

installation of fastest did not make any trouble ...

indeed the complete answer is

any idea ?
thank you for your answers ;)

[mpagli]

Hello, you might want to check your gcc version.

[charlotteVDD]

sure...

Actually, I doubt I have a gcc...

[mpagli]

Could this fasttext issue be relevant? facebookresearch/fastText#386 (comment)

[charlotteVDD]

Yes the problem seems to be close to that but in my case it seems that it is a bit different since the error comes from the sent2vec.cpp file.
I installed fastText as recommended from the readme...
anaconda version is 4.5

[mpagli]

I don t have a mac to test this, but maybe try adding this code in setup.py:

def has_flag(compiler, flags):
    """Return a boolean indicating whether a flag name is supported on
    the specified compiler.
    """
    import tempfile
    with tempfile.NamedTemporaryFile('w', suffix='.cpp') as f:
        f.write('int main (int argc, char **argv) { return 0; }')
        try:
            compiler.compile([f.name], extra_postargs=flags)
        except setuptools.distutils.errors.CompileError:
            return False
    return True


def cpp_flag(compiler):
    """Return the -std=c++[0x/11/14] compiler flag.
    The c++14 is preferred over c++0x/11 (when it is available).
    """
    standards = ['-std=c++14', '-std=c++11', '-std=c++0x']
    for standard in standards:
        if has_flag(compiler, [standard]):
            return standard
    raise RuntimeError(
        'Unsupported compiler -- at least C++0x support '
        'is needed!'
    )


class BuildExt(build_ext):
    """A custom build extension for adding compiler-specific options."""
    c_opts = {
        'msvc': ['/EHsc'],
        'unix': [],
    }

    def build_extensions(self):
        if sys.platform == 'darwin':
            all_flags = ['-stdlib=libc++', '-mmacosx-version-min=10.7']
            if has_flag(self.compiler, [all_flags[0]]):
                self.c_opts['unix'] += [all_flags[0]]
            elif has_flag(self.compiler, all_flags):
                self.c_opts['unix'] += all_flags
            else:
                raise RuntimeError(
                    'libc++ is needed! Failed to compile with {} and {}.'.
                    format(" ".join(all_flags), all_flags[0])
                )
        ct = self.compiler.compiler_type
        opts = self.c_opts.get(ct, [])
        if ct == 'unix':
            opts.append('-DVERSION_INFO="%s"' % self.distribution.get_version())
            opts.append(cpp_flag(self.compiler))
            if has_flag(self.compiler, ['-fvisibility=hidden']):
                opts.append('-fvisibility=hidden')
        elif ct == 'msvc':
            opts.append(
                '/DVERSION_INFO=\\"%s\\"' % self.distribution.get_version()
            )
        for ext in self.extensions:
            ext.extra_compile_args = opts
        build_ext.build_extensions(self)

And replace the call to setup by:

setup(
  name='sent2vec',
  ext_modules=cythonize(ext),
  cmdclass={'build_ext': BuildExt}
)

The extra code is coming from the setup.py of the fasttext library, it seems they fixed the compilation on mac already. I have no clue if this is going to work. Let me know.

[charlotteVDD]

Yes ! it worked !!
thanks a lot ;)

[yasonk]

This worked for me to a point. I'm now getting -lrt issue. I removed it from the Makefile, but it is being used somewhere. Any ideas how to get rid of it?

creating build/lib.macosx-10.7-x86_64-3.6
    g++ -bundle -undefined dynamic_lookup -L/anaconda2/envs/py36/lib -arch x86_64 -L/anaconda2/envs/py36/lib -arch x86_64 -arch x86_64 build/temp.macosx-10.7-x86_64-3.6/src/sent2vec.o build/temp.macosx-10.7-x86_64-3.6/src/fasttext.o build/temp.macosx-10.7-x86_64-3.6/src/args.o build/temp.macosx-10.7-x86_64-3.6/src/dictionary.o build/temp.macosx-10.7-x86_64-3.6/src/matrix.o build/temp.macosx-10.7-x86_64-3.6/src/shmem_matrix.o build/temp.macosx-10.7-x86_64-3.6/src/qmatrix.o build/temp.macosx-10.7-x86_64-3.6/src/model.o build/temp.macosx-10.7-x86_64-3.6/src/real.o build/temp.macosx-10.7-x86_64-3.6/src/utils.o build/temp.macosx-10.7-x86_64-3.6/src/vector.o build/temp.macosx-10.7-x86_64-3.6/src/real.o build/temp.macosx-10.7-x86_64-3.6/src/productquantizer.o -lrt -o build/lib.macosx-10.7-x86_64-3.6/sent2vec.cpython-36m-darwin.so
    clang: warning: libstdc++ is deprecated; move to libc++ with a minimum deployment target of OS X 10.9 [-Wdeprecated]
    ld: library not found for -lrt
    clang: error: linker command failed with exit code 1 (use -v to see invocation)
    error: command 'g++' failed with exit status 1

[hoi-nx]

When I try to compile the library as Setup & Requirements suggests by running make command, errors pop up as below:
c++ -pthread -std=c++0x -O3 -funroll-loops args.o dictionary.o productquantizer.o matrix.o shmem_matrix.o qmatrix.o vector.o model.o utils.o fasttext.o src/main.cc -o fasttext -lrt
ld: library not found for -lrt
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [fasttext] Error 1
how to fix on macbook

[guptaprkhr]

Do you still have the same error? Or are you able to install it now?

[kgarg8]

I was receiving the following fatal error on Mac:
src/sent2vec.cpp:669:10: fatal error: 'ios' file not found

It got resolved by adding -std=libc++ to both compile-options and linker-options as shown in the below link:

https://stackoverflow.com/questions/53809584/issues-about-installing-pcl-in-my-computer